jack in the box's tacos

I was told by a friend that the Jack in the Box tacos, which seemingly
contain meat actually do not use meat due to shipping reasons. He said
that a soy-based product was substituted instead. Is there any truth to
this? Are they fully vegetarian or is some amount of meat mixed in? I
asked a local Jack in the Box cashier who just looked at me in confusion...
thanks,
trevor
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